Imported Upstream version 1.4upstream/1.4

1 files changed, 120 insertions, 0 deletions

diff --git a/src/cmd/internal/rsc.io/x86/x86asm/plan9ext_test.go b/src/cmd/internal/rsc.io/x86/x86asm/plan9ext_test.go
new file mode 100644
index 000000000..21f5bfd12
--- /dev/null
+++ b/src/cmd/internal/rsc.io/x86/x86asm/plan9ext_test.go
@@ -0,0 +1,120 @@
+// Copyright 2014 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package x86asm
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"log"
+	"os"
+	"strconv"
+	"testing"
+)
+
+const plan9Path = "testdata/libmach8db"
+
+func testPlan9Arch(t *testing.T, arch int, generate func(func([]byte))) {
+	if testing.Short() {
+		t.Skip("skipping libmach test in short mode")
+	}
+
+	if _, err := os.Stat(plan9Path); err != nil {
+		t.Fatal(err)
+	}
+
+	testExtDis(t, "plan9", arch, plan9, generate, allowedMismatchPlan9)
+}
+
+func testPlan932(t *testing.T, generate func(func([]byte))) {
+	testPlan9Arch(t, 32, generate)
+}
+
+func testPlan964(t *testing.T, generate func(func([]byte))) {
+	testPlan9Arch(t, 64, generate)
+}
+
+func plan9(ext *ExtDis) error {
+	flag := "-8"
+	if ext.Arch == 64 {
+		flag = "-6"
+	}
+	b, err := ext.Run(plan9Path, flag, ext.File.Name())
+	if err != nil {
+		return err
+	}
+
+	nmatch := 0
+	next := uint32(start)
+	var (
+		addr   uint32
+		encbuf [32]byte
+		enc    []byte
+		text   string
+	)
+
+	for {
+		line, err := b.ReadSlice('\n')
+		if err != nil {
+			if err == io.EOF {
+				break
+			}
+			return fmt.Errorf("reading libmach8db output: %v", err)
+		}
+		if debug {
+			os.Stdout.Write(line)
+		}
+		nmatch++
+		addr, enc, text = parseLinePlan9(line, encbuf[:0])
+		if addr > next {
+			return fmt.Errorf("address out of sync expected <= %#x at %q in:\n%s", next, line, line)
+		}
+		if addr < next {
+			continue
+		}
+		if m := pcrelw.FindStringSubmatch(text); m != nil {
+			targ, _ := strconv.ParseUint(m[2], 16, 64)
+			text = fmt.Sprintf("%s .%+#x", m[1], int16(uint32(targ)-uint32(uint16(addr))-uint32(len(enc))))
+		}
+		if m := pcrel.FindStringSubmatch(text); m != nil {
+			targ, _ := strconv.ParseUint(m[2], 16, 64)
+			text = fmt.Sprintf("%s .%+#x", m[1], int32(uint32(targ)-addr-uint32(len(enc))))
+		}
+		ext.Dec <- ExtInst{addr, encbuf, len(enc), text}
+		encbuf = [32]byte{}
+		enc = nil
+		next += 32
+	}
+	if next != start+uint32(ext.Size) {
+		return fmt.Errorf("not enough results found [%d %d]", next, start+ext.Size)
+	}
+	if err := ext.Wait(); err != nil {
+		return fmt.Errorf("exec: %v", err)
+	}
+
+	return nil
+}
+
+func parseLinePlan9(line []byte, encstart []byte) (addr uint32, enc []byte, text string) {
+	i := bytes.IndexByte(line, ' ')
+	if i < 0 || line[0] != '0' || line[1] != 'x' {
+		log.Fatalf("cannot parse disassembly: %q", line)
+	}
+	j := bytes.IndexByte(line[i+1:], ' ')
+	if j < 0 {
+		log.Fatalf("cannot parse disassembly: %q", line)
+	}
+	j += i + 1
+	x, err := strconv.ParseUint(string(trimSpace(line[2:i])), 16, 32)
+	if err != nil {
+		log.Fatalf("cannot parse disassembly: %q", line)
+	}
+	addr = uint32(x)
+	enc, ok := parseHex(line[i+1:j], encstart)
+	if !ok {
+		log.Fatalf("cannot parse disassembly: %q", line)
+	}
+	return addr, enc, string(fixSpace(line[j+1:]))
+}